Category Archives: Fertility & Soil

Applying Gypsum to Wisconsin Soils Dick Wolkowski, Extension Soil Scientist The interest in the use of gypsum in crop production has increased in Wisconsin for a variety of reasons. The installation of “scrubbers” at coal-fired power plants has reduced S emissions … Continue reading →

New Instructional Video on Calibrating a Manure Spreader Kevin B. Shelley, UWEX Nutrient and Pest Management Program The UW Extension Nutrient and Pest Management Program has produced an instructional video on determining manure application rates as part of the process … Continue reading →

Nutrient Content for Dairy and Swine Manure in Wisconsin, 1998-2010 John Peters, Department of Soil Science, UW-Madison The nutrient value of manure can be assigned by using estimated “book” or average available N, P2O5 and K2O content. However, testing manure may … Continue reading →

Average Soil Test Phosphorus and Potassium Levels Decline in Wisconsin John Peters, Department of Soil Science Soil test data from over five million samples collected from Wisconsin farmland and analyzed by both public and private Wisconsin Department of Agriculture, Trade … Continue reading →